package com.atguigu.springcloud.alibaba.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.atguigu.springcloud.alibaba.service.PaymentService;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

@RestController
@Slf4j
public class CircleBreakerController {
    public static final String SERVER_URL = "http://nacos_payment_provider";

    @Resource
    private RestTemplate restTemplate;

    @GetMapping(value = "/consumer/fallback/{id}")
    //@SentinelResource(value = "fallback") // 没有设置
    //@SentinelResource(value = "fallback", fallback = "handleFallback") // fallback只负责业务异常
    //@SentinelResource(value = "fallback", blockHandler = "blockHandle") // blockHandle只负责Sentinel控制台配置违规
    @SentinelResource(value = "fallback", fallback = "handleFallback", blockHandler = "blockHandle",
            exceptionsToIgnore = {
                    IllegalArgumentException.class
            })
    public CommonResult<Payment> fallback(@PathVariable Long id) {
        CommonResult result = restTemplate.getForObject(SERVER_URL + "/paymentSQL/" + id, CommonResult.class, id);
        if (id == 4) {
            throw new IllegalArgumentException("IllegalArgumentException,非法参数异常.....");
        } else if (result.getData() == null) {
            throw new NullPointerException("NullPointerException,该ID没有对应记录，空指针异常");
        }
        return result;
    }

    /**
     * 本例是fallback
     *
     * @param id
     * @param e
     * @return
     */
    public CommonResult<Payment> handleFallback(@PathVariable Long id, Throwable e) {
        Payment payment = new Payment(id, "null");
        return new CommonResult<>(444, "兜底异常handleFallback,exception内容" + e.getMessage(), payment);
    }

    /**
     * 本例是blockHandle
     *
     * @param id
     * @param blockException
     * @return
     */
    public CommonResult<Payment> blockHandle(@PathVariable Long id, BlockException blockException) {
        Payment payment = new Payment(id, "null");
        return new CommonResult<>(445, "blockHandle-sentinel限流，无此流水：blockException" +
                blockException.getMessage(),
                payment);
    }

    /**
     * OpenFeign
     */
    @Resource
    private PaymentService paymentService;

    @GetMapping(value = "/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id) {
        CommonResult<Payment> result = paymentService.paymentSQL(id);
        return result;
    }

}

